プロンプト
An empty school planetarium at dusk where two seats glow under a projected starry sky. 2026 trade-cover trend: oversized structural typography, high-contrast palette, strong readability at thumbnail size. All cover text must be Japanese only; render the quoted title and author name in correct, complete Japanese characters. Book cover with title "放課後のプラネタリウム" and author name "星野ゆめの" rendered on the cover.. Workflow direction: Create the finished flat front-cover artwork itself, not a photograph or mockup of a physical book. The rectangular front cover must fill the entire output canvas edge to edge, viewed perfectly straight-on with the camera perpendicular to the artwork. Build a compelling genre-appropriate key image, readable title hierarchy, deliberately placed author name, short correctly rendered Chinese or English title text enclosed in quotation marks, strong silhouette at thumbnail size, and trim-safe breathing room for practical editorial use.
Style-specific direction:
Style: polished contemporary romance book cover with emotionally warm editorial illustration and refined restraint.
Subject: preserve the requested people, relationship cue, setting, and period; communicate intimacy without adding extra characters.
Composition: portrait front-cover layout, close but uncluttered focal grouping, delicate botanical framing, clean title-safe space, thumbnail readability.
Lighting or Color: soft diffused golden-hour light; blush, champagne, cream, and one deeper contrast tone.
Typography: render the exact quoted title once in elegant flowing script and the exact quoted author once in clean small capitals; keep both crisp and correctly spelled.
Output format: flat front-cover artwork only, filling the canvas edge to edge and viewed perfectly straight-on; no physical book object, spine, pages, back cover, perspective, mockup, badge, logo, watermark, duplicated text, or explicit content.. Avoid: physical book, 3D book, book mockup, product mockup, spine, pages, page
